There are two cyclists traveling along the same path.
One of them lets say cyclist
A has a speed of
20 miles per hr and starts traveling at
12 PMAnother cyclist let us say
B has a speed that we do not know and that is what is required by the question.
Cyclist
B starts traveling along the same path as
A but
2 hrs later than
A i.e. at
2PM
Also at
4PM both cyclists travel the same distance from the starting point P.
Let us find out how much can cyclist
A travel in
4 hrs, that would be \(20*4 = 80\) miles
Since cyclist
B started at
2PM and reached the exact distance as cyclist A at
4PM. Cyclist
B traveled for
2 hrs only.
Therefore if Cyclist B speed was
x miles per hr then
2x = 80or, \(x = 40\) which is the speed of cyclist B
_________________